Hey I have a 52 inch Mitsubishi DLP one day it just decided to just
show a screen of little tiny black and white checkers,the sound comes
on and for what I can tell the remote works, I have changed inputs, but
still the same thing, I even tried resetting the whole tv do you have
any idea what could be causing this?
I have the same problem, if you still have the problem try to check the signal board too it to can cause the checker block on the screen..ps cal pts corp they said to repair th fmt board is 154.27, the signal board is 227.85, but pts corp said it is best to send all the boards for 309.50......
Hey those silly diodes and caps were WAY too tiny, I just went ahead and sent the whole board in and am in the process of changing out other capacitor diodes on the power supply that are starting to look like they are bloating out as well, those large capacitors I can handle soldering but those tiny diodes and Caps look like a pain in the but to replace and best left to the professionals.......thanks, James
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Re: whats with my tv?
Replace all caps that are swollen, but resolve your checker pattern:
1. Tile or block pattern replace D8F00 and D8F01 part # 264P828010, also replace C8F26 and C8F29 part # 141P148000 (1 uFD, 25 V) on the FMT PCB (part # 930B924002).
The diodes have a stripe (line) that is the cathode, at one end of the device, the board will reflect that line. Good Luck, big IRISH. PS ; De solder as best as you can, glue is under part, heat one end, while prying up, heat other end. It will come off with moderate to mid high heat.
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Your TV is DLP projection TV. DLP is Digital Light Processing. Digitally processed light coming out of DMD (Digital Micro mirror Device) is projected on the TV screen. This DMD is made of thousands of tiny mirrors & the size is about 0.7 inch. These mirrors are fixed with tiny hinges for its movement. They reflect light as per processed signal. DLP is invented by Texas Instruments. When there are dots on the screen, that means the tiny mirrors representing the dots are stuck in its position. If the dots are few & the viewing is bearable, just leave as it is. If the dots are more than bearable then you will have replace the DMD chip which is quite costly.
All TV have boards that control vertical and horizontal output to their respective areas. They are connected to the screen by ribbon cables.
If one of these boards fails all together, has a failed chip, a bad connection, or a bad ground somewhere it will result in a black line in the area of that board. A bad ribbon cable connection on the bottom will result in a vertical black bar though the screen.
Many times resetting the connection will fix it, if the ribbon cable has been nicked there could be a severed connection. They an sometimes be fixed, but it is a pain. An yes I have done it, but the bar is gone. The same will happen if the chip that outputs to that area opens.
The connectors are the first place to look paying close attention to the cable, they are extremely delicate so great care must be taken if you decide to tinker with em, the usually have lift locks that release them.
Hi, I have a mitsubishi 65" DLP model # 65733 that I bought in December 2007 brand new, about six months ago I started spoting white dots on my screen that started blinking and then became permanent, thinking is was dust I cleaned everything inside with compressed air without success.
The stars multiply daily to a point that it was intolerable to watch anything with all the white stars and a few black ones that showed up.
We called mitsubishi but got no where, I was out of warranty. (they still deny having a problem with their DLP's)
I had a service tech inspect the tv and was told it could run about $800 to $1000 to replace the light engine with refurbished parts with 90 day warranties.
Researching on line I came across a DLP chip that is compatible with several mitsubishi and samsung models, so I decided to chance it, and replace just the DMD chip before we trash the tv, it was unthinkable to pay $800 to repair a tv that we could buy now for under $900.
Thanks God the "gamble" paid out and the problem got solve with just $150 DLP chip in about 15 minutes of my time.
If you are not mechanically nor electronically inclined, I recommend you use a technician for the installation, but don't let anyone tell you you need to replace the whole light engine, it is a ripoff.
If your problem is just white or black dots on the screen that do not move.......this will solve your problem!!
P.S. Hope this will help you and for the record..... "I will never buy a mitsubishi product again".
If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD, DLP & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.